No, television is known for it's misconception to the public eye. It would not be reliable especially for something like working out or fitness, because television is also associated with something that contributes to laziness.
The most reliable consumer electronics that are available for purchase would depend on what type of electronic equipment you are looking for. Sanyo is a reliable brand for television sets. Dell is a reliable source for purchasing computers.
Many websites sell the Ultimate Chopper. A reliable source of it would be Amazon, but there are many online shops specializing in products sold from television commercials.
Because the tv stations get paid money to put up advertisements. They then use this money to pay for the rights to use a new tv show episode on their channel. Without commercials, commercial tv is nothing.
Cable TV Equipment allows one to gain access to many more television channels. This provides an endless source of entertainment with a variety of interesting channels in topics such as cooking, sports, etc.
I found a site that has the information for the top brand on it. The site seems a reliable source, and I hope you agree. http://www.squidoo.com/LCD-televisions
Weather Direct can be a reliable source for local weather information, but it's always recommended to cross-reference the data with other reputable sources like the National Weather Service or Weather.com to ensure accuracy and reliability.
I checked with a very reliable source being the actual Progressive Insurance company who , obviously would know about "Brad" in their TV commercials. They said Brad is played by Scott Beehner, an actor and comedian. You can also see him and his biography at IMdB and on YouTube in comedy skits.
Checking local ads or newspapers would be a great source for information on the Samsung Pixon. Television commercials could simply offer reviews on the product as well.
General online shopping stores such as Amazon, or eBay retailers are a reliable source of 32 inch LCD HDTVs. Specialist electronic equipment stores such as Currys provide another option, while TV manufacturer websites such as Toshiba or LG give the consumer yet more choice.
This may not be the answer you're looking for, but Complaints.com has a forum that allows you to voice your feelings about excessive tv commericals along with many other subjects of complaint. I wish I could suggest a source more substantive to address this issue, because I can relate.
Reliable is an adjective, and source is a noun.
If you are referring to connection cables for your TV, (http://www.monoprice.com/) is an excellent online source for cables, much cheaper than any physical retailer. If you're referring to the actual cable box equipment from your cable company, your best bet would be to call them and request replacement parts, as using your own equipment may violate their terms of service.